Production system using the dismounting method for fastening member

Abstract

The dismounting device includes, in order that a fastening member is dismounted from a base material, the fastening member comprising a head and a body, the body being inserted into a fastening hole formed in a base material, the head contacting a peripheral edge of the fastening hole into a fastened state with the body, a cutting member for cutting a boundary region between the head and the body from the head toward the body to separate the head from the body, the cutting member removing the fastening member from the base material.

What is claimed is:  
     
       1. A method for recovering a base material by removing a fastening member including a head and a body, the body of the fastening member being inserted into a fastening hole formed in a base material, the head of the fastening member being placed in contact with a peripheral edge of the fastening hole to assume a fastened state with the base material, the method comprising the steps of: 
       inspecting the fastened state of the fastening member with respect to the base material;  
       judging that the fastened state between the fastening member and the base material provides inadequate fastening on the basis of the inspecting; and  
       cutting the fastening member from a boundary region between the head and the body to separate the body and the head from each other to remove the fastening member from the base material using a cutting blade having a knife edge, wherein the boundary region is a cylindrical region which is smaller in diameter than a diameter of the body of the fastening member and which is parallel to an outer peripheral surface of the body of the fastening member.  
     
     
       2. A method for recovering a base material by removing a fastening member comprising a head and a body, the body being inserted into a fastening hole formed in a base material, the head being placed in contact with a peripheral edge of the fastening hole to assume a fastened state with the base material, wherein the method comprises the step of: 
       cutting the fastening member, in the fastened state with the base material, from a boundary region between the body and the head to separate the body and the head from each other to remove the fastening member from the base material using a cutting blade having a knife edge, wherein the boundary region is a cylindrical region which is smaller in diameter than a diameter of the body of the fastening member and which is parallel to an outer peripheral surface of the body of the fastening member.